Wow. What a match. Congratulations to Djokovic to have accomplished what he did at his age. I think it the pressure was too big for Carlos. He couldn't create angles and Djokovic managed to create them making Carlos error. Also, I think the format of 3 matches maximum for male has played a role where Carlos couldn't make Djokovic get tired. Carlos still has plenty of time to make the gold medal at the future Olympics, I'm sure.